Have the same problem trying to figure out what to throw out at home. 
It was easy to get rid of the Acer games--most of those are trial versions anyway.
But what about these?
Acer Arcade Deluxe - Acer games have been deleted, keep the arcade for videos, music, pictures, or let WMP, Media Center handle these?
MS Office - trialware At some point I may buy MS Office. Do I need these as placeholders?
Activation Assistant
Excel 2007
One Note 2007
PowerPoint 2007
Word 2007 - haven't used, but have some old Word docs may need to open. M$ replaced Word with "Works Word Processor" in MS Works.
MS Office Live Add-in
Office Live Add-in help
Office Live Add-in workplace
Windows Defender - replaced by MSE--still needed?
Vista "My Stationary" - have one letterhead template created from MS Works. rest probably won't get used.
NTI Backup Now 5 - think these two were freebies from Acer "partners" for registering, and solicit you to buy the "full" version
NTI Media Maker 8
Software Informer - must've downloaded this, but don't know if it's reliable, and if it's a good idea to let third-party software update by itself.
EarthLink TotalAccess - must've been a reason this wasn't deleted before, but I can't remember what it is!
MediaRECOVER Lite - another Acer partner freebie in crippled form with prompts to "upgrade"
MS Office 2003 PowerPoint Viewer - will this even work if PowerPoint 2007 trialware is deleted?
Personal Photo Manager Deluxe - think this is another Acer partners freebie. Redundant with a couple of MS photo organizers and Picasa. Keep anyway?

It was easy to get rid of the Acer games--most of those are trial versions anyway.
But what about these?
Acer Arcade Deluxe - Acer games have been deleted, keep the arcade for videos, music, pictures, or let WMP, Media Center handle these?
MS Office - trialware At some point I may buy MS Office. Do I need these as placeholders?
Activation Assistant
Excel 2007
One Note 2007
PowerPoint 2007
Word 2007 - haven't used, but have some old Word docs may need to open. M$ replaced Word with "Works Word Processor" in MS Works.
MS Office Live Add-in
Office Live Add-in help
Office Live Add-in workplace
Windows Defender - replaced by MSE--still needed?
Vista "My Stationary" - have one letterhead template created from MS Works. rest probably won't get used.
NTI Backup Now 5 - think these two were freebies from Acer "partners" for registering, and solicit you to buy the "full" version
NTI Media Maker 8
Software Informer - must've downloaded this, but don't know if it's reliable, and if it's a good idea to let third-party software update by itself.
EarthLink TotalAccess - must've been a reason this wasn't deleted before, but I can't remember what it is!
MediaRECOVER Lite - another Acer partner freebie in crippled form with prompts to "upgrade"
MS Office 2003 PowerPoint Viewer - will this even work if PowerPoint 2007 trialware is deleted?
Personal Photo Manager Deluxe - think this is another Acer partners freebie. Redundant with a couple of MS photo organizers and Picasa. Keep anyway?









I removed the MS Office validation app in addition to the Office trialware. I also removed the Vista upgrade app. Hope I don't have to go back and restore the whole pre-bloatware-removal setup! 

