Namslas:
Got your "PM", & also responded here, in a bit better detail, & here goes -
Well, IE7 has a "built-in" addons management tool in its menus... specifically -> TOOLS menu, Addon management submenu...
Barring that? I guess you could look here in your registry:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Extensions]
Using the REGEDIT.EXE tool... be careful though, if you are NOT familiar w/ its use... but, from what you say? You don't have much choice... I would burn that ones you are having hassles w/ & be happy to be rid of such an annoyance!
That SHOULD cover it, where many/most of them are... for starters @ least!
And, like others stated above, about Java? Get its latest revision, v6, & uninstall the others... that ought to be good enough for THAT part, as others stated.
Good Luck!
APK
P.S.=> Add/Remove Programs in CONTROL PANEL may aid you here as well... apk