I'm wondering if anyone may have come across this browser problem...

just a couple of days ago my computer started throwing me out of Netscape as soon as it would load... can't figure it out.

Today I installed FireFox and as soon as it loads it too disappears into thin air... same as above with Netscape.

Also, IE has started ignoring "onclick" scripts and won't let me send email in my gmail account... it's like the send button was just a graphic... no response!

I ran a virus scan... none!

Does anyone have any ideas as to what is happening and/or how to fix?