What happens when you try to upload? Can you post the error messages?
So far we know nothing about what you are doing except that it does not work. Without more info I do not see how we can help.
Check the port in the OS - Device Manager.
Hi i have tried to reinstall the entire time, it just wont start.
I tried to do delete arduino15 in my local, it doesn t neither
Here is my log:
D:\Program Files (x86)\Arduino>arduino_debug
Set log4j store directory C:\Users\tommy\AppData\Local\Arduino15
Loading configuration...
Initializing packages...
Preparing boards...
java.io.IOException: The cloud file provider is not running
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:255)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:161)
at java.io.BufferedReader.readLine(BufferedReader.java:324)
at java.io.BufferedReader.readLine(BufferedReader.java:389)
at processing.app.legacy.PApplet.loadStrings(PApplet.java:270)
at processing.app.helpers.PreferencesMap.load(PreferencesMap.java:100)
at processing.app.helpers.PreferencesMap.load(PreferencesMap.java:74)
at processing.app.packages.UserLibrary.create(UserLibrary.java:77)
at cc.arduino.contributions.libraries.LibrariesIndexer.scanLibrary(LibrariesIndexer.java:224)
at cc.arduino.contributions.libraries.LibrariesIndexer.scanInstalledLibraries(LibrariesIndexer.java:201)
at cc.arduino.contributions.libraries.LibrariesIndexer.rescanLibraries(LibrariesIndexer.java:161)
at cc.arduino.contributions.libraries.LibrariesIndexer.setLibrariesFolders(LibrariesIndexer.java:120)
at processing.app.BaseNoGui.onBoardOrPortChange(BaseNoGui.java:677)
at processing.app.Base.onBoardOrPortChange(Base.java:1333)
at processing.app.Base$11.actionPerformed(Base.java:1537)
at processing.app.Base.rebuildBoardsMenu(Base.java:1509)
at processing.app.Base.(Base.java:277)
at processing.app.Base.main(Base.java:150)
java.lang.NullPointerException
at processing.app.helpers.PreferencesMap.load(PreferencesMap.java:101)
at processing.app.helpers.PreferencesMap.load(PreferencesMap.java:74)
at processing.app.packages.UserLibrary.create(UserLibrary.java:77)
at cc.arduino.contributions.libraries.LibrariesIndexer.scanLibrary(LibrariesIndexer.java:224)
at cc.arduino.contributions.libraries.LibrariesIndexer.scanInstalledLibraries(LibrariesIndexer.java:201)
at cc.arduino.contributions.libraries.LibrariesIndexer.rescanLibraries(LibrariesIndexer.java:161)
at cc.arduino.contributions.libraries.LibrariesIndexer.setLibrariesFolders(LibrariesIndexer.java:120)
at processing.app.BaseNoGui.onBoardOrPortChange(BaseNoGui.java:677)
at processing.app.Base.onBoardOrPortChange(Base.java:1333)
at processing.app.Base$11.actionPerformed(Base.java:1537)
at processing.app.Base.rebuildBoardsMenu(Base.java:1509)
at processing.app.Base.(Base.java:277)
at processing.app.Base.main(Base.java:150)
Clean up instructions for an IDE re-install.
Bob.
CLEAN UP BEFORE INSTALLING ANOTHER COPY OF THE IDE OR ARDUINO CREATE.pdf (347 KB)
I have installed the Arduino IDE from Windows Store. When I started it up it asked me to update and then takes me to arduino.cc. The Windows Store version is 1.8.9 and not 1.8.10. I really thought the Windows Store version was going to be updated immediately.
Issue has already been raised.
Most also find the regular IDE more reliable.
Bob.
I tried that liek 5 times already 
Do you have any additional security on your computer ?
If so turn it OFF to test.
Also which particular IDE ? OS ?
Bob.
Had 1.8.8 running quite happily on the Pi. Foolishly tried to update to 1.8.10 and broke everything.
Running ./install.sh from a shell fails because of write access to /usr/local/..etc....
$ su ./install.sh gets further but fails at "#Install using xdg-utils" with the error;
cannot touch '/root/.local/share/applications/mimeapps.list' : no such file.
Looking at install.sh this error is obvious because it runs xdg-mime as the native user which, since we ran the script under 'sudo' is root. Changing this line to;
su ${SUDO_USER} xdg-mime default ${RESOURCE_NAME}.....etc....
allowed the installation script to complete.
NOW, however, if I click on the "Arduino" icon in menu/Programming I get a timer icon for about 45 seconds then it disappears.
If I try to run it from a shell I get;
/usr/local/bin/arduino: line 35: /home/john/Downloads/arduino-1.8.10/java/bin/java: cannot execute binary file: Exec format error.
Now completely stumped as to what's going wrong and project stopped because I no longer have a development tool.
I've tried to uninstall and re-install it but to no avail
Someone help!!!
ballscrewbob:
Do you have any additional security on your computer ?
If so turn it OFF to test.Also which particular IDE ? OS ?
Bob.
I tried IDE
euhm i have alvast and windows defender. i ll try to turn it off.
I think the problem is i once had installed it on another hardrive, but that hardrive died. Now i itried to uninstall and reinstall.
so it doesn't work anymore
Which IDE ? ?
Having had it on another drive that is no longer present could also cause issues.
have attached clean up instructions to help you remove what may be left of the IDE before you install a new copy.
Bob.
CLEAN UP BEFORE INSTALLING ANOTHER COPY OF THE IDE OR ARDUINO CREATE.pdf (347 KB)
ballscrewbob:
Which IDE ? ?Having had it on another drive that is no longer present could also cause issues.
have attached clean up instructions to help you remove what may be left of the IDE before you install a new copy.
Bob.
arduino-1.8.10-windows.exe
i did the clean instruction 
but it still didn t work
I uploaded my big debug in the atachment
arduinodebug.txt (52.7 KB)
i just re-install arduino IDE 1.8.10, and found this problem
i've been check on library folder and everything is clean, but still found this,
libraries directory checklist:
C:\Users\yu5f1\Documents\Arduino\Librarie
C:\Program Files (x86)\Arduino\Libraries\
Arduino: 1.8.10 (Windows 10), Board: "Arduino/Genuino Uno"
Multiple libraries were found for "Wire.h"
Used: C:\Program
Multiple libraries were found for "LiquidCrystal_I2C.h"
Used: C:\Users\yu5f1\Documents\Arduino\libraries\LiquidCrystal_I2C
Using library Wire at version 1.0 in folder: C:\Program Files
Using library LiquidCrystal_I2C at version 1.1.2 in folder: C:\Users\yu5f1\Documents\Arduino\libraries\LiquidCrystal_I2C
exit status 1
can someone help?
I've encountered a problem and possibly a bug where in version 1.8.10 an ino file is compiled against a precompiled core as opposed to building a core at compilation time like Arduino does in version 1.8.9 and lower.
The problem presents itself when driving an L298N H-Bridge module where driving the enable pins 2 to 7 through analogWrite() doesn't output anything if there are one of the enable pins is set to 255 (in which case the one at 255 works fully and the other at a lower value works at the lower value). So this happens in version 1.8.10 where Arduino compiled using a precompiled core.
When compiling, the exact same code using <1.8.9, it works as expected. Has anyone got any ideas or pointers to any resources that I may have missed.
I can confirm this - my Unos still show up but all Arduino Nanos (that were working before) do not - meaning the menu item PORT is greyed out.
So I checked the board manager and upgraded all board libraries - but without success.
Is this a known issue for the version 1.8.10 ?
This topic has been merged into multipe library.
what gives?
I've reinstalled it.
windows 10
(deleted)
Posted this a few days ago but it appears to have got lost somewhere; lets have another go,
Had 1.8.8 running quite happily on the Pi. Foolishly tried to update to 1.8.10 and broke everything.
Downloaded and unpacked the 64 bit arm version of 1.8.10.
Running ./install.sh from a shell fails because of write access to /usr/local/..etc....
$ su ./install.sh gets further but fails at the line;
"#Install using xdg-utils"
with the error;
cannot touch '/root/.local/share/applications/mimeapps.list' : no such file.
Looking at install.sh this error is obvious because it runs xdg-mime as the native user which, since we ran the script under 'sudo' is root. Changing this line to;
su ${SUDO_USER} xdg-mime default ${RESOURCE_NAME}.....etc....
allowed the installation script to complete.
NOW, however, if I click on the "Arduino" icon in menu/Programming I get a timer icon for about 45 seconds then it disappears.
If I try to run it from a shell I get;
/usr/local/bin/arduino: line 35: /home/john/Downloads/arduino-1.8.10/java/bin/java: cannot execute binary file: Exec format error.
Now completely stumped as to what's going wrong and project stopped because I no longer have a development tool.
I've tried to uninstall and re-install it but to no avail
Someone help!!!