Is Flash 10,2,1559,1 compatible with FF4.0.1(18)

Question

Windows XP sp3 home editon
Firefox4.0.1(18)
I received notices last weekend ref updates to Adobe Flash and Firefox. I downloaded both and the problems began. My computer started to hang  and freeze up and only hard reboot would let me back on. Biggest problems were in Facebook. Cursor hangs so I can't scroll even on home page. Started knocking me out of games or hanging up completely I saw a suggestion on your forum to go back to FF3.6.17 so I did. Then it would not even let me load any games. Had problems even getting on Facebook. I do love to play games on FB and Pogo.
Is there anything else I can try? Any fixes? Firefox says the issue is with Adobe, and Adobe told me the other day it was the new FF4. Should I try a different plugin? If so, do you know of one and how I can get it? Sorry to sound so stupid, but, I'm not computer savvy.
Maybe someone who uses FF4 and FP10 will have had issues to and already figured it out.
Thanks so much for any help you can give.

Answer 1

eidnolb said he had company and to follow instructions from Pat, which  I think is you?
He asked if I had done request you sent me and I replied and I told him I did not know Pat's email log in name so no. I am so sorry, but I don't know what you asked me to get and send back to you.
Since I just realized now that you are probably Pat and I had no idea who Pat was, I didn't perform or do any of his request because the subject line was different most of the time. Then eidnolb sent me an email and told me to ONLY reply and do requests received from him or Pat. He told me he would be unavailable most of this week and Pat would handle my problems.
Would you possibly be able to either send your request again or direct me to your email request so I can get you the information you have been waiting on? I am sorry for not taking any action, but I had no idea what Pat's email name was. When I received email from eidnolb today asking if I had replied to you yet, I immediatley emailed back and asked who Pat was but I have gotten no reply. I guess he had left for the day.
Thanks so much for putting up with my many questions. As I told eidnolb, I am not computer savvy at all.
I did find a email from him asking me to go to regedit.exe and navigate to Key_HKEY_LOCAL_MACHINE\software\Microsoft\INTERNET Explorer\Active X Compatibility\(D27CDB6E-AE6D-11CF-96B8_44455354O00). I checked and there is no such Key showing. He also said if a DWORD w/name Compatibity Flags with any value other than 0x000000 kill bit for Flash maybe set.
The only entries listed seem to apply to my Malware download. I found 2 entries named Newvalue #1-REG_DWORD with same number Ox00000000(0). Is this what you need? If not, please tell me how I can find the correct entry in the registry. I am not sure how to navigate in the registry, but I followed his instructions perfectly and the above is all I found. Sorry again if I am not looking in the correct place.
I will wait for your reply before proceeding any further.
Thank you very much for your patience.
tcenters