Have you gone through this before?
i.e., you have re-loaded (for lack of a better term) this "light" OEM version that you created from the OEM recovery partition before; all seems well at 1st, then the system steadily degrades and the process is repeated?
I would definitely use the FULL Toshiba OEM recovery disk(s) and re-install Windows 7.
I would also suggest that you wipe the HDD with KillDisk and install Windows 7 Enterprise 90-day Trial version -
http://technet.microsoft.com/en-us/evalcenter/cc442495.aspx
I would go with the trial version 1st - it is full retail with embedded keycode.
Install trial version via USB in case DVD drive has some issue like mine did. It took me ~18 months and at least that many re-installs to figure that one out. USB install did the trick for me in <20 minutes.
You last reinstalled <4 days ago, so you should know within a few days if the new re-install goes the same way this one did or not/