i have an acer aspire M5640 and when i press the start button a few seconds later i it fails to boot up with the following symptoms:

I get a message saying "Windows failed to start. A recent hardware or software change might be the cause. i says something about a installation disc and i dont have it. it also gives me the following options 1. Insert your Windows installation disc and restart the computer.
2. Choose your language settings and click next.
3. Click "repair your computer"

It also gives me the following options:

4. Safe Mode
5. Safe Mode with networking
6. Safe Mode with Command Prompt
7. Last known good configuration
8. Start Windows normally
none see to work. what can i do only a true geniusis can answer this so please help:)

,,please help..I have downloaded and installed the latest update for vista..It is called vista sp2 update..,it says,,this installation will last for an hour or more.,blah blah,after then i waited and installed the update..When i tried to boot my pc..It says ..Windows failed to start.A recent hardware or software change might cause..I have 2 choices,launch startup repair(recommended);start windows normally..I tried to choose launch startup repair and for so long..Finally its finished..But!!The problem is when i start it normally the Microsoft corporation sign and the progressbar appears so long..and ive waiting for hour but nothing happend..Please help me with dis problem..Pls thnx..

Windows failed to start?

Okay so i got spyware today on my pc. Then i downloaded a program that found the spyware and said it would erase it. But it said it had to restart the computer to completely remove the spyware. I restarted my computer and its says "windows failed to start. a recent hardware or software change might be the cause." I tried windows memory diagnostic, doesnt work. I tried all the options of starting it, such as safe mode, doesnt work. and i dont have a windows installation disc. I dont know what to do.
this probably isnt gonna help but the file is " CI.dll" and the status is "0xc0000098" and it says windows failed to load because a required file is missing or corrupt.

When I restart my computer I keep getting a black screen with the message

Windows failed to start. A recent hardware or software change might be the cause. If
windows files have been damaged or configured incorrectly, startup repair can help
diagnose and fix the problem. If power was interrupted during startup. Choose start
windows normally

Launch startup repair

Start windows normally

When I choose either one it goes back to this same screen asking it again. I also tried
using the reinstalling dvd windows vista home basic 32bit

When I press f 8 it gives me a list of options on advanced boot options
I,ve tried repair your computer and safe mode and it still does the same thing