Why my IE and Firefox run slow and have too many crashes?

I have to scan together with MS Safety Essential or Windows Defender for getting it functioning.But 20-30 mins later this slows down or lock-ups again.
We have 2 various other old windows (Flock an Netscape Navigator) this run fine rather than crash.Tend to be my Firefox in addition to IE9 inconsistant
This continues to be happening for you to both my desktop and also notebook Computers.How can one correct this

Scan that System for Viruses and Remove them

A virus infected for a computer harms the program files and configures the particular registry incorrectly.Scanning and also removing that viruses infected for a computer could fix this matter.Use the best antivirus computer software.

Fix Registry:

Registry contains all the details of the particular applications that marilyn and i install in this PC by using keys.In the event keys connected with any course get damaged it will not likely work adequately.

Fix registry linked issues making use of some attached cleaner for example McAfee Collateralized RegInOut Tidier.

If your own two windows are crashing on same moment, it will be the problem due to your COMPUTER ITSELF, reinstall your own OS.