Lets try cleaning up the computer of any trash files.
Do the following:
go to ccleaner.com
download crap cleaner
install it wherever
once opened, check everything in the left submenu if it is not already checked.
in the bottom right, click run cleaner
Let it work, and lots of crap will be cleaned from your computer.
Note: Dont use the issues feature unless theres a trained professional there at your side.
Secondly, click start. Click run, and type msconfig
click the startup tab
uncheck nearly everything you dont absolutely need on startup.
Reboot your computer, then try it out.
Open my computer, and in the address bar type %temp%
Delete any files listed
Make sure you have an antivirus/antispyware
I reccomend zonelabs secuity suite and adaware se personal.