Help Bootmgr is Compressed...Tried everything

First run the fix posted earlier for your error using Win7 DVD Repair console or System Repair Disk: BootMGR Compressed Message at Boot Fix - Vista Forums

If it won't start then run Startup Repair repeatedly, report back results.

If further problems with HD are in evidence, run the maker's HD Diagnostic extended CD scan, followed by a full Disk Check from the DVD or Repair CD Command Line if necessary.

As I said earlier Partition Wizard is one of a number of good apps to download and run a disk check if you are not comfortable running a command line chkdsk and provides an easy to understand GUI.

I assume that people are stating that you can recover from a disk compression if your battery dies mid process. It would be useful if this could be confirmed.
The link referred appears to focus specifically on a compressed boot manager issue.

If battery died during C compression then it might be salvageable, but "Bootmgr is compressed" error means the boot files have already been compressed so will need to be extracted to have any chance to start again. This is why it needs to be done first then let Startup Repair see if it can work.

Yes, PW's Check File System is a good alternative and will sometimes work when Disk Check balks from CMD. Disk check via one of these methods is an excellent idea.

It may also see drives which Disk Mgmt and even WinRe won't and repair them enough to be seen by Windows.

I don't know about the surface scan as it doesn't appear to do much more than report bad sectors, which is nice to know but the HD's maker's CD repair scan can actually fix surface errors - often allowing Disk Check to finish its job.

gregrocker said:

I don't know about the surface scan as it doesn't appear to do much more than report bad sectors, which is nice to know but the HD's maker's CD repair scan can actually fix surface errors - often allowing Disk Check to finish its job.

Yes you're right that does appear to be quite a weakness. It's probably unlikely that another screen would pop up after finding bad blocks.