Slow when running some Windows applications

[plaguna]

My computer is very slow when some Windows applications are running. I defragmented and fixed bad sectors of the C: drive, I deleted open and running applications through regedit, I removed all the unnecessary programs, cookies, temp files, scanned and fix antivirus. It is slow only with Windows applications, especially with Microsoft Word and Excel. Other applications and Internet browsers run with a reasonable speed. Do you know anything else that I can do?
Thank you in advance.
plaguna

[DonRayner]

How about some information on what type of hardware you are running and what your OS is? What version of Word and Excel are you running? The more information that you can provide the better your chance is of getting an answer to your question.

Don

[plaguna]

The specifications are:
Dell Optiplex GX280
Windows XP Pro version 2002
Service Pack 2
Pentium(R) 4 CPU 3.00GHz
2.99 GHz 0.99 GB RAM
Microsoft Office 2007
By the way,I have anotther computer with the same specifications and It doesn’t have this problem

Plaguna

[DonRayner]

Are you running anti-virus, I know McAfee's on access scan can slow things down somewhat.

Is it the application itself that is slow to open or the documents? IE:

Without word open how long does it take to open doc when you dbl click?
With word open how long does it take to open doc with file-open command and with a dbl click?

[plaguna]

It was slower opening the file when I dbl click, and when changing some data, especially in Excel.
What I did though, after you mentioned the Anti-Virus; I disabled the office plug-in once I have the Anti-Virus Norton. And, the speed improved tremendously.
Thank you for your input.

plaguna