People here in Pakistan wont take it that seriously so then they suffer with the lake of speed in there Operating System .. if your are a serious internet User then your PC require your Attention.
There is nothing like any software anywhere that could boost the speed of your PC yet it is us who gonna make our pc free of those un necessary applications and softwares that are some how eating are speed.
Always make sure that what SYSTEM PROCESS are Running and what are they Doing .. just hit the Ctrl + Alt + Del and make your self aware of the Processes .
Get Rid of the Spams and Malewares .. use any good anti spam software and always install an updated antivirus version it will be a plus if it Support a Anti Spam module
Use FireFox or Chrome instead of IE .. u will experience a greater net speed boost with Some FireFox Extensions as such ADBLOCK and FLASHBLOCK .
Always Clean your Windows Registery and Defrag your Hard Drive once a Week.
Be Continues about the Security and health of your Personal Computer .. your Computer Deserve your serious Attention only then it will return u the best.