Is my GeForce 7300LE sick?

The symptoms....

When I right click the Desktop and select *Properties* I get no tabs at all,
just the *Themes*

Scrolling, vertically _and_ horizontally is not smooth, but rather in jumps,
with the screen
refreshing to the new position, a bit up or down (or left or right) of the
previous screen. It
looks like waves moving until it settles down again (hard to describe).

The theme is set to 1280x768 to suit the widescreen TV I use for a monitor
(26 inch Samsung),
but the picture is now stretched horizontally, so it looks like 4:3 on a 6x9
widescreen.

Movies are jerky, looks like low frame rate.

Despite uninstalling and reinstalling the card, and (re) updating the
drivers, Device
manager shows an exclamation mark to indicate a problem.


Computer is a 4 year old Dell Desktop, an XPS9150 running Windows XP
Professional
Service Pack 2 (SP3 will not install, but that's another problem...)

Processor is 3.20 gigahertz Intel Pentium D 16 kilobyte primary memory cache
2048 kilobyte
secondary memory cache 64-bit ready Multi-core (2 total) Not hyper-threaded.

My feeling is that the 7300LE card is defunct, but how cam I be _sure_
before I rush out to
buy a new one?



TIA

--
Rog