i think my question essentially has to do with this line of reasoning. are there any other things i can do (to try to fix the problem now) before/as opposed to sending in for service (as so advised by hp site), such as
1. chkdsk C: /R
2. following up on trying to fix the sfc scannow "cannot repair" file member. if someone can please help me to decipher the cannot-be-repaired string, and to translate that into the file and path required, and also how and where to find a "good copy" of that file. (previously last year, guiltyspark and ultimatepsv helped me to fix a problem on my previous notebook by going to the recovery disc x (windows vista), doing a dir search, and copying the required files onto the c drive)
3. using system image backup recovery (as mentioned by you, digitalagent).
4. "repair your computer".
5. reinstall of original windows discs.
6. "last known good configuration" (but i do not know if windows will recognize at what point the webcam driver stopped working)
so what i am trying to figure out, is what are the things i might possibly be able to do, and whether these things that are listed above would be useful in addressing the problematic issues, and if they are, where should they fall in the increasing line of fallback options (that is to say, in what order i should use them).
one of the reasons that i am trying to go with this line of reasoning, is that i do have another problem with a sony program on my computer, which i do not know if is related to this webcam problem or not. so it is not just to do with webcam, but also trying to solve issue with windows-as-regards-to-why-sony-program-not-working.
(let's say for instance, the webcam problem is mechanical, then no amount of file consistency checking or problem resolution (for example, cmd prompt) would solve it. but they might lead to solving the windows-sony-program problem (especially if what sfc has detected is actually the cause of the problem).
likewise, if i just send in the webcam for physical servicing, it may solve that, but it won't get me the sony program working.
and IF it is a viral infection (or some other unknown, but not so malicious cause) that has somehow disabled both tools, then maybe one or other of the above (or maybe some other solution that the engineering superpowers at htg might know of,) might actually be able to solve the problems.
any thoughts anyone?