Another sync-error

Development Tools IDE 1.x
1

Hello,
I'm fairly new to Arduino and only programmed/tikered with a UNO v3 and on one occation a mini pro 5v version.
I have at an earlier point without any problem uploaded code to both my boards.

So I bought 5 more pro mini boards.
Now, suddenly, I'm not able to upload ANYTHING to my pro mini boards.
First my laptop stopped recognizing my FTDI (Now solved, I have two different ones).

Then, it starts uploading but stops and gives a failsync error. It happens with both my FTDI's and two of my pro mini boards. I have also tried on two different laptops, one with win7 64-bit and one with win7 32-bit. Both PC's have Arduino v1.5.7 in.
Both stops after a few seconds into the avrdude session. Please see below for the error codes that comes up:

avrdude: Version 6.0.1, compiled on Apr 3 2014 at 23:12:16
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch

System wide configuration file is "C:\Program Files\Arduino/hardware/tools/avr/etc/avrdude.conf"

Using Port : COM7
Using Programmer : arduino
Overriding Baud Rate : 57600
avrdude: Send: 0 [30] [20]
avrdude: Send: 0 [30] [20]
avrdude: Send: 0 [30] [20]
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x01
avrdude: Send: 0 [30] [20]

It tries for 10 times and then quit.
Help is much appreciated..

PS!
I also have a nano board that my PC's refuses to recognize. Any help here also??

2

Hmm, OK.
So, I still dont know what happened to my FTDI's.

I managed, however, to program the Pro Mini via my Uno board. I also tried to burn a bootloader via the Uno, but either I'm doing it wrong or it does not work. It says it's going to take a few minutes and then it just dumps a load of error messages and quits.

I'd still would like to know what's just happened to my FTDI's or if anybody have a solution for that..

And then, there's also my Micro and Nano that does not install..