Outlook 2007 preview pane slow to load

The preview pane in Outlook 2007 has suddenly started to load extremely slowly.   I have a relatively new PC (7 months old), plenty of memory and disc space, and have not changed anything recently.   Until yesterday, the preview pane always loaded instantly.   Since yesterday, it takes anything from 20 seconds to a minute.   Any ideas what is causing this behaviour.   It makes the preview pane unusable.
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try switch your mail from html to another form this may sort it out? it seems like a problem with parsing it.

have you updated your office install with a SP? have you installed any new form of viewing/printing software?
DavidRMasonAuthor Commented:
Further investigation shows this is probably not an Outlook problem at all - I have a svchost process eating up 45% of my CPU - so the problem is why is this happening and how to stop it
run hijackthis and post the results up here
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DavidRMasonAuthor Commented:
Here it is.   I've read mixed reports of registry scanners though and have the impression that they deliberately exaggerate problems to make you buy their product.   Meanwhile I've rebooted my PC and the svchost process that was eating up cycles has gone away and Outlook is now fine.
why not try an office repair just as a security measure.... i find registry mechanic is quite good it does exactly whatit says on the tin!
sorry not security measure you know when your doing 2 things and you write what your thinking

try a office repair just as a failsafe.

DavidRMasonAuthor Commented:
Thanks - I did run office repair, it fixed one problem but didn't say what it was.   All appears well now.  Now I recollect I saw somewhere that HP printers can cause a runaway svchost process, and it may well have been that.
oh yes... the multifunction printer software is a absolute resource hugger! i wouldn't use any of their bundled software!

Try outlook in Safemode - Outlook.exe /safe

Does the preview pane work as expected? If so, go to trust center and addins and start disabling third party addins until you find the culprit.
DavidRMasonAuthor Commented:
GWMerrell - thanks for the suggestion, I'll bear it in mind if I have problems in future.   However as you will see from other comments, the real problem was nothing to do with Outlook, but a rogue svchost process, possibly due to a bug in the software for my multi-function HP printer.
DavidRMasonAuthor Commented:
Final comment on this item:
a) the real problem was nothing to do with Outlook, it was caused by a runaway svchost.exe process which didn't re-appear on reboot
b) the cause of this hasn't been determined but as it hasn't recurred will close this question
c) as none of the proposed solutions by the experts was relevant I can't really accept any as being the "solution", so the only way I can think to close this is to accept my own comment as the solution - if this is the wrong process no doubt someone will let me know

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