SERIOUS ADOBE ACROBAT PROFESSIONAL 8 ERROR

And moreover, this solution does not work for everyone. I tried the same approach for instance, and it failed...

Loti - we have never been told of a fix for XP. Even the download site your refer to says it's for Vista.

On October 2nd, Kevin Cheng posted a solution to the original problem after he and others were able to resolve it:
http://www.adobe.com/support/downloads/detail.jsp?ftpID=3750

I don't quite understand why this continues. Could someone help me understand?

There is no solution yet Phil, unfortunately. I experience the same problems, as do a lot of XP users. Adobe can't figure the problem out (as of yet). In my case, even 'hovering' over a .pdf-file with the mouse causes this error to pop up! I'm still waiting for some kind of solution either (all the others posted here at this forum did not help me in any way, unfortunately)... guess you should do the same.

I got the same error message yesterday after downloading some patch or automatic update that Adobe sent me. (Thanks Adobe.) Anybody know how to fix it?

It seems like many people are experiencing this same error.

I just found out about this problem the hard way. Downloaded a patch yesterday (10/25/07) that came from Adobe -- thanks Adobe!!!-- and now I've got that "serious error" with 8 professional. Is it fixed? If so, will somebody tell me where to go to get the fix?

... Continued from #254
The idea of disabling one core is that recently my mainboard crashed and I decided to replace the whole system.I have to tell you that I had no problem using acrobat on my old PC.
As my previous CPU was a P4 2.4 and the new one is Athlon 6000 X2 dual-core, I guessed this problem could be dual-core related. and because I was tired of reinstalling windows several times and trying many changes in BIOS and etc, I had no hope that this will work, so I tried both ways together and now can't decide which one was helpful.
By the way, my brother has a PC with Athlon 3600 X2 dual-core, but he's not experiencing any problem at all! :))

Hi Kevin
I really can't find out as I don't know how to deactivate Acrobat's license and try again having both processor cores active.

Hi H Ezzati,

Your solution for XP looks interesting.
Do you know if modifying boot.ini to /numproc=1 has any significant?

Thanks,
-Kevin

My problem was:
After installing Acrobat Professional 8.0 on both XP and Vista, it didn't bring up activation window! trying to end process fnplicensingservice.exe caused acrobat to close after about 20secs.

And my solution:
-In Vista
I downloaded this patch
http://www.adobe.com/support/downloads/detail.jsp?ftpID=3750
Adobe Acrobat 8 licensing service update """(Windows Vista only)"""
applied it and it solved the problem.
-In XP I tried two modification together and I don't know wich one really helped!
First I started XP using /numproc=1 switch in boot.ini (assumed that dual-core processor is interfering)
I replaced C:\ProgramFiles\Adobe\Acrobat8.0\Acrobat\FNP_Act_Installer.dll with the one found in above mentioned patch.
Tried to run acrobat and Yes! activation window appears and everything is runing smoothly.
then removed /numproc=1 from boot.ini and still OK.
looks that the patch which is "Windows Vista only" is working fine for XP too.

tell me if this works for you folks :)