As suggested by Shri Sushubh try the following.
Step1 : Advanced Windows Care personal or Pro from Computer Repairs Free Software | IObit | Computer Repairs Service | Online Computer Repair
Run all the programs. or select one by one.
Step2 : DiskSweeperFree2 from Crave Worldwide - Free download essential and useful softwares
Check in menu (at the bottom left)
tick exclude system files
tick 0 byte files
tick hidden files. ( More Cleaning: you will be surprised at the disk space saved )
Step3 : Ccleaner from filehippo.com - Download Free Software ( for regular use )
at 2 & 3 list many other Free Software and choose an Antivirus and Antispy program and run in your computer. AVG and Spybot recommended.
( Warning : Create Back up first in Spybot.
Spybot may affect System Restore function. Please check the details).
Check any improvement in Browsing/or speed,ted websites/popups etc and free disk space gained.
Para two : Download FireFox browser from
http://www.mozilla.com/firefox/and also
Addon Adblock Plus/ IE Tab.
Switch to IE from FF and see/feel the difference.