Urvashi_89 :
my sony vaio i5 ( E series) Winsows 7 home premium 64 bit , 4 gb laptop hangs often..
If your having random slow downs while computing then you will have to troubleshoot on your side to find what the problem is. Start on the software side.
1st -
Download CCleaner. Click on Tools. Now uninstall any unused program. Please use common sense about this and don't uninstall something your not 100% sure you don't need. If you're unsure, ask us. But get rid of any software that for example sony might have put on there like cd/dvd burning software you don't use.
2nd - re-open CCleaner and go to cleaner section and run the cleaner. Might take a bit if its your first time. Be patient.
3rd - do the registry section as...