The copy of GIMP from the
official site is clean, so if you downloaded it from there then that was not what infected your system.
What I use on my system to keep it clean is Avast! Antivirus (free, just need an email address to register it), which checks for threats in real time, so if you open a reported website they'll stop you from accessing it. They also do your standard antivirus stuff, like scanning for issues and whatnot. However, there is another feature in it that, for me, is very good at removing deep infections such as trojans, and that is the
Boot Time Scan. What this does is scan your system when it first starts up,
before Windows starts up, and thus scans before the malware can wake up and start hurting your system.
What I would suggest is:
- If you can get access to another computer, then download the Avast! installer and put it on a USB stick. Then, while in Safe Mode, use the USB stick to transfer the installer to your computer and then install the antivirus. If you can't get access to another computer, open Windows in Safe Mode (with Networking) and download it using your regular computer, then install.
- Once it is installed, go to the 'Scan' tab
- Select 'Boot Time Scan' from the dropdown
- Click 'Settings'
- In 'Areas to Scan' select 'All Harddisks'
- In 'Heuristics Sensitivity
select 'High'- Click 'Okay'
- Click 'Start' to schedule it for the next time you restart your computer
- Restart your computer
- Wait for it to finish scanning
When that's done and you find any infections, send them to the virus chest. The virus chest is like quarantine, so anything in there won't affect your system. The advantage here over deleting the files is that sometimes antivirus programs will flag a file that isn't dangerous, and if you send them to the chest you can undo the action, whereas you can't retrieve a file if they are deleted.
Anyway, give that a go and see if that helps at all. If not, respond with what happened and we'll work out something from there.
Good luck.
