Computer runs slow or freeze, Yahoo E-Mail is very slow or unresponsive?

[allen]

Hi , A i bought a Used computer a few years ago, i had a friend of mine "Clean" it before i started using it, I installed a new Hard drive, and upgraded the Memory cards, My freind Installed the Windows Operating system, and intalled Avast Security. I was experiencing MANY. Frozen Pages and, Program does not Rrespond messages, among many other problems, So, I took it back to my freind, he Reinstalled the operating system and it worked well for about 3 weeks, Now it is doing the same thing again, Very slow in opening Yahoo Mail, and opening Yahoo HomePage, My yahoo mail is virtually inoperable, I get the,Little yellow triangle all the time with the "!" in it, and a message that says, "Done, But with errors" I have done the defragmentation and Avast Scans for malware and addware, it comes up with no Virus's and no Addware, i have checked my, Online'Speed" and it is within normal perameters, I know a bit about computers, but not enough to know how to fix this ongoing problem. Maybe my Registry? is there an Online site that i can use like,MyCleanPC,com, that is available for free.? Any advice is greatly appreaciated, thanks, Allen

[NBSN]

If you would like me to, I will try several steps in helping you to fix this problem. You can message me at: https://www.facebook.com/pages/NBSN/205302762950470 and we can work on this step by step. Also, are you sure that your friend installed a genuine copy of Windows on your computer?

[Kaliburr Ford]

Advanced SystemCare from IObit might be able to help. Avast also tends to cause a fair amount of problems.

Advanced SystemCare:
http://www.iobit.com/advancedsystemcareper.html