Acer says window fails to start

[jonnyt1109]

i have an acer and it was working fine and when i turn it on it starts to load up as normal an then it goes to this black screen an at the top it say window error recorvery an then goes on saying windows failed to start. recent hardware or software change might be the cause. if windows files have been damaged or configured incorrectly. startup repair can help daignose and fix problem. if pawer was interrupted during startup choose start wundows normally.
then it offer the option to launch startup repair or start window as normally i tried both option an it just goes right back to this screen an i cant figure out whats wrong college student plz help

 

[WR2]

Hello jonnyt1109;

Got all your files and personal documents backed up?

 

[jonnyt1109]

when i click start up as normal or launch repair it say something about hard drive and removable disk was remove improperly all i order laptop from acer brand new but did not get any disk with it but i did make a backup disk

 

[WR2]

You didnt like take the HDD out or anything like that?