registry problem !!!!! and audio problem

[sabean2.0]

i am having two problems.....lately my computer is getting unusually slow...friend of mine advised me to check registry being novice to registr and all those stuff...i downloaded "registry seeker" and scanned for registry and it showed
553 errors. i was really stunned with he finding
most errors are in Active x, COM, OLE sections

the errors like
HKEY_Classes_root
pkmsa.addstartaddress
Invalid Active x/COM entry(CLSID)

HKEY_CLASSES_ROOT
extension

HKEY_LOCAL_MACHINE
invalid servise


and i am also haing problem with my audio. I cannot play music. music starts but stiops and plays and even jumps( as like playing scratched CD). this is really weird. i use WMP and VLC for music and from VLC i got following mesage
ain warning: audio drift is too big (137429), dropping buffer
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
main warning: output date isn't PTS date, requesting resampling (95985)
main warning: audio drift is too big (205399), dropping buffer
main warning: audio drift is too big (179277), dropping buffer
main warning: audio drift is too big (153155), dropping buffer
main warning: audio drift is too big (127032), dropping buffer
mpgatofixed32 debug: libmad error: Huffman data overrun
main warning: output date isn't PTS date, requesting resampling (96032)
main warning: audio drift is too big (193431), dropping buffer
main warning: audio drift is too big (167308), dropping buffer
main warning: audio drift is too big (141186), dropping buffer
main warning: output date isn't PTS date, requesting resampling (63936)
main warning: audio drift is too big (177685), dropping buffer
main warning: audio drift is too big (151563), dropping buffer
main warning: audio drift is too big (125441), dropping buffer
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
main warning: output date isn't PTS date, requesting resampling (64065)
main warning: audio drift is too big (161706), dropping buffer
main warning: audio drift is too big (135584), dropping buffer
main warning: output date isn't PTS date, requesting resampling (63942)
main warning: audio drift is too big (171705), dropping buffer
main warning: audio drift is too big (145583), dropping buffer
main warning: output date isn't PTS date, requesting resampling (64832)
main warning: audio drift is too big (179364), dropping buffer
main warning: audio drift is too big (153242), dropping buffer
main warning: audio drift is too big (127120), dropping buffer
main warning: output date isn't PTS date, requesting resampling (66813)
main warning: audio drift is too big (166360), dropping buffer
main warning: audio drift is too big (140237), dropping buffer
main warning: output date isn't PTS date, requesting resampling (64072)
main warning: audio drift is too big (176374), dropping buffer
main warning: audio drift is too big (150252), dropping buffer
main warning: audio drift is too big (124130), dropping buffer
mpgatofixed32 debug: libmad error: bad main_data_begin pointer
main debug: control type=1
main warning: output date isn't PTS date, requesting resampling (64796)


my computer status
microsoft xp professional
acre aspire 9410, 120 gb HDD, 1 gb memory
inter dual core T2300E

so gus please help me............