Thanks guys for responding, but F2 produces nothing.
A) Switch on computer and continue pressing F2.
Welcome to Windows. Windows Xp.
To begin, click user name.
I click user name ( continueing pressing F2 )
After 30 seconds screen opens to my standard wallpaper,
blank, with no icons or options and remains that way.
B) If I s/w off computer reboot clicking F8-
Box appears instructing to -
'select boot device' listing-
If I select hard drive, press enter, clicking F2 - same result as A)
Its a weird problem, especially for a computer dummy.
Any other advice before I slip to the back pages.