It would be nice to know what Win you're running, and some specs of your craptop, processor/ram/space.
If it's on Win XP, reinstall XP.
If it's specs are shit, reinstall XP.
If it's on something higher than XP, reinstall Win7.
Don't forget to get to know your important hardware, at least by name (motherboard/chipset, audio drivers, graphics, touchpad etc) so you can download and install the drivers for it later. Even better: If you had a CD with drivers shipped with your laptop, use it.
Lastly but most important: Before you do anything towards flattening your system MAKE BACKUPS OF YOUR PERSONAL AND IMPORTANT FILES AND DATA ON AN EXTERN STORAGE DEVICE. I cannot re-iterate often enough how important that is, i've lost five good working gta_sa configs due to a rushed reinstall 4 days before the LWW.
Also, before you fuck around, you might wanna give opening the case and cleaning the inside parts and fans a shot. (pls not with water)
It would also be an idea to put new cooler paste on the CPU socket, you might wanna get a local expert to help you with that though.
Laptops all have the same problem:
1st month: Runs CallOfModernBattlefieldDeluxeGhostSniper on max with 999fps.
2nd month: Runs CallOfModernBattlefieldDeluxeGhostSniper on max with 998fps.
4th month: Runs 1080p video on 23fps.
1 year: Runs 720p video on 18fps.
2 years: Overheats if Skype and Firefox are open at once.
3 years: Overheats if Firefox is open.
4 years: Overheats.
5 years: Over.
VC-MP: 
