Error in registry

Hello sir/ma'am,
I have recently installed windows XP black edition v6 ultimate.... More or less after installing NOD32 antivirus, though i had Comodo antivirus by default, one error message suddenly appeared, IN 3 DIFFERENT windows and still everytime appearing when launching any application or even when launching add/remove programs....

Written " ERROR " on top, saying ....
A RUNTIME ERROR HAS OCCURRED, DO YOU WISH TO DEBUG?
LINE: 99
ERROR: LIBRARY NOT REGISTERED.

I tried 2 fix the prob with Registry mechanic, Registry booster(Uniblue) and even Malwarebytes, they always find only 2 problems one saying MISSING OR INVALID PATH in
The key HTML help under HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS contains a bad path or value name AM_LHA.chm ....

And the other saying,
MISSING OR INVALID PATH in
The key DefTextPathes under HKEY_CURRENT_USER\SOFTWARE\GABEST\VSFILTER contains a bad path1 for the value c: \subtitles ....

I repair them but again after restarting and scanning these 2 appear :(

Please help me, i don wanna to format it again.... please.... :(