Well...I see several things I would address.
1. System was procured via eBay...and it's a laptop. That means (IMO) that it was not necessarily new and was not procured with a warranty...a warranty is a necessity (IMO) for anyone who buys a laptop and who is not technically proficient in the repair and troubleshooting of issues which come with such.
2. If system was previously used, damaged, rebuilt, etc...the burden falls on the purchaser. Many items are sold "as is", which totally relieves the seller of any responsibility for anything.
3. There's no indication that a clean install was done, if system was not new.
4. Manuals for many systems can be viewed/downloaded from the website of the manufacturer.
5. There's no indication that any maintenance was routinely performed. Running the chkdsk /r command and defragging the system...are basic maintenance procedures for any system, IMO.
6. File corruption...is just a fancy way of saying that files have become damaged. Happens all the time, for varying reasons. Running chkdsk /r is one way of trying to overcome such with system files. For and program files...best thing to do is simply uninstall the offending program and then reinstall it, no other way to remove a damaged file.
File Corruption & Its Consequences - http://www.smartcomputing.com/Editorial/ar...3.asp&guid=
Hard Drive Data Corruption - http://users.iafrica.com/c/cq/cquirke/baddata.htm
7. A problem with the file system or the hard drive itself...will often necessarily show up as something less obvious. IMO, more users need to understand the importance of assuring oneself that system problems are not due to file system/hard drive problems.