What can i do to speed up my pc like it was before?

ok well if you play a 3-D game it uses memory on the video card. to refresh it you restart it and it wont lag as bad. another problem might be your video card might not be very good. but to make it faster (which is what you wanna know lol) is free up some hard drive space. look up "disk cleanup" in the start menu and do it. once its done checking, go to the second tab and click the bottom "clean". it will delete all the system restore points exept the latest one. it cleaned 18 GBs once and 16 another time. it helps alot. and if your anti-viruses keep picking up anti-virus, i heard that you dont want to "delete" them, but instead put them to "the chest" as its called. it locks it from acsesing system files. and if you uninstall some games, do a disk defragment. and i heard that theres a big virus going around tonight. thats what i heard on the news so i hope this helps and yeah, thepiratebay had alot of viruses, and beware of that illegal downloads. they get you nowhere execpt trouble. but this is "yahoo lectures" now is it? have fun with your gamin =P