Alright, I see many bad-not helpful replies in here, and many good ones. For obvious reasons, I am not gonna bother pointing out which are wrong and focusing on the good ones.
USB is supported.
Windows 7 is NOT supported.
How can Windows 7 be not supported? Every computer supports Windows 7 and Vista, except the ones that are below minimum requirements.
If so, (if your laptop is below min.), then yes, your system cant handle windows 7.
But still, cheap laptops dont need Windows 7 anyway. Win XP is perfect for them.
What? Dont tell me you wanna play games with DX11 on your laptop who doesnt even have a decent GPU to support it?
Forget what people told you, Win XP is just fine.
Now, it is very simple. Do this:
Find a friend who has a flash drive. Use their PC to download Malwarebytes, SpyBot S&D, and free Avast A/V.
Install these to your PC, starting with Malwarebytes. Do a full scan. Kill everything it finds. Reboot. Install/run SpyBot S&D, full scan, kill it all. Reboot. Install/run Avast, set it to run a boot time scan. Kill all it finds.
If you need to, do these things in safe mode. BTW, Have you tried booting into safe mode with networking to see if IE will work that way?
Then, when all is done. Open a command prompt in admin mode and type in sfc /scannow to see if any system files were damaged.
Once everything is normal, BACKUP your mods, turn off system restore, reboot, then turn system restore back on (this clears the restore points) .
Don't delete the restore points in disc cleanup, this gets rid of all but the most recent one. The most recent one may be full of malware/viruses. Using this restore point would do what? Restore the malware/viruses.
Doing it by turning system restore off, rebooting, then back on gets rid of ALL restore points.
It is very important that you do it from another computer, and do it on Safe mode.
RedneckDude is correct, except that Avast A/V is not very good. If I were you, I would try NOD32 instead of Avast.
And trust me, Spybot S&D and Spyware Doctor are equally awesome. As a matter of fact, I just used Spyware Doctor, "just to be safe", because I was concerned about my PC due to your story, and guess what, It did find a serious infection on system.
I dont know what it was, but when SD detected it, NOD32 also displayed a message that a serious threat was deleted. It was that exact file.
He he, as soon as Spyware Doctor found it, NOD32 deleted it. Now thats teamwork!
Here's my piece:
1. Download from a different CLEAN PC the programs you need.
2. Boot in Safe mode. You can do this by continuously hitting F8 on your keyboard as soon as your comp is turned on. A screen will appear with some choices. Choose "Safe Mode". It will take some time to boot the windows, dont worry thats normal.
3. Install Malwarebytes, Spyware Doctor and NOD32.
4. Run a FULL system scan on all these programs. The order in which you do this doesnt matter. Although, considering that Spyware Doctor is the most effective one, I would start with that.
5. Spyware Doctor or Spybot? Both are equally awesome. None of them has failed me all these years I use them, although I slightly favor Spyware Doctor. Choose whichever you want.
6. Once each scan is complete, make sure ALL threats are selected, and remove all these infestations.
7. Boot windows normally, and delete all the restore points, as RedneckDude very well said.
8. VERY important: DO NOT have all 3 or even 2 of these programs running at the same time. After each program finishes with its scan, uninstall it. I have found out that some (not all), but at least a few of these A/V or Antispyware programs often "collide" with one another, and it is best to use each one separately. At least dont let them all running at the same time. Spyware Doctor and NOD32 work fine together, but I am not so sure about other similar programs.
9. Once you are done with everything, do the necessary checks to see if the infestation(s) were removed. Report here.
One last thing: If you are worried about NOD32 not being free and all, you dont have to purchase it. Just download a trial version of it. You only need it for a full scan and then uninstall, after all.
That would be all.