The Windows version shouldn't matter nor the used browser.
Only thing I can think of at this moment, is that something on the W7 machine is crippling the email and/or password when it is send.
Besides IS, any other security (related) software installed ? (or was there)
Does it make a difference if you disable the avast shields or change a setting in avast ?
Just tried disabling IS & no different. I only have Malwarebytes in addition. That's it at present.
Actually the reason I wanted to get onto the forum via new PC was that I think it may have been corrupted by something from the old PC either as they are networked or from USB file transfers, although I set up Avast before anything was connected & always scanned usb before uploading files, partly because I have for a long time suspected something was on XP machine. I half thought it may just be as it's about 8yrs old & XP is no longer supported etc.
Have scanned XP many times in past with Avast IS, Malwarebytes, Superantispyware, Spybot S&D, & Spywareblaster, but nothing ever shows up. Regular Symptoms have been very very slow to open files of various types from Microsoft Office, Design software (FlexiSign Pro 8.1) PDF complete, Slow browsing, Outlook Express (6) crashing occasionally & very frequently blue screen on shut down (everything goes through correct shut-down until Windows saving settings & then straight to blue screen rather than proper shut down. Then on start-up it displays message that system has recovered from serious something or other.
It also seems that frequently if I leave PC with a couple of programs open in the evening particularly, say Flexisign Pro & maybe Firefox & then come back a couple of hours later the programs have become unresponsive & end up having to shut down with on/off button.
Now with new Win 7 PC I have also had a couple of occasions with unresponsive programs, frozen screen etc. so I fear something is wrong.