Unable to start Windows 95

My son tried to install a network card on my computer.  Now the computer won't boot.  I used a boot disk which tries to start Windows 95 but then just gives me an a\ prompt.

I changed to my C\ drive, opened the Windows directory and typed "win".  I get an error message that says "HIMEM.SYS is missing.  Make sure the file is in your Windows directory."

How can I get my computer to run Windows?
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Try booting into safe-mode by pressing F8, and remove the network card from control panel -> system.
If the network card is still in the computer try removing it, or make more IRQs available by going into BIOS and disabling unused COM ports.

Post the contents of your c:\autoexec.bat.

If you don't have the file, you'll have to re-install certain things.

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When you say it won't start, at what point does it stop?  Black Screen, Windows 95 Startup Screen, etc...
If your Windows '95 won't start (locks up on the windows 95 intro screen or on a text screen during startup) changes are you have an IRQ conflict.  Solving this will require a further explaination of the problem:

1.  What model of Network Adapter are you using?

2.  Is the adapter PnP (The infamous "Plug and Pray".)

3.  What IRQ is the adapter using?  (To check this, boot in safe mode, right-click on "My Computer" and choose properties.  Select the device manager tab, and press the plus under network adapters, and double click on your adapter.  Then click the resourses tab and note the Interrupt Setting.

4.  Check other devices in this way to see if any of them use the same one.

In the meantime, boot in safe mode, right-click My Computer, choose properties, click device manager, double click network adapters, and double-click your adapter.  Check the box marked "Disable".  This should allow you to access your computer again.

jasoncolson :
If this problem requires further explaination why did you lock the question?
CayanneAuthor Commented:
The computer would not let Windows 95 open.  We removed the Network card (Unicom Ethernet 2-in-1 Adapter Card) but the system would not boot up.  It kept going back to the A\prompt.

The error message: "HIMEM.SYS is
                                    missing.  Make sure the file is in your Windows directory."   kept appearing.

I tried to use the F8 key but it wouln't let me open even in safe mode.

I copied the file HIMEM.SYS from my boot disk, rebooted without the boot disk and it finally opened Windows.

I don't know that anyone's information really helped me but if someone wants to claim the 200 points, please just explain why this happened in the first place and tell me how to avoid it happening again.

Thanks all.
If himem.sys was missing from windows directory of drive C: What got rid of it.  Virus? Someone deleted it?
I do not think so in this case.

Formatting a disk as a system disk copies the hidden io.sys and command.com needed to boot to dos. Starting from a disk with only those files will start the machine and leave you at the root drive of the boot disk.  In this case A:\

you try to start windows by going to that directory but the path is pointed at the boot disk. In this case a: so it can't find himem.sys.  If it is in the root directory of a: Windows could be trying to find it in A:\windows which of course is not there.  
Solution include a autoexe.bat file on boot disk that includes a path statement to A:\

Starting in safemode will only work if the floppy disk is not in the drive.

The computer might not have booted after installing the card for many reasons.
a: If the card had jumper switches that needed to be set. Only a manual of the Motherboard can help with setting switches and bios settings.  Contacting the Manufacturer is a place to locate that information.
B: Card was not functioning properly. C: if something was bumped off when installing and than reconnected when taking the board out.
Knowing how far the computer gets in the boot sequence is important in determining what exactly is going wrong.

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CayanneAuthor Commented:
I finally got the computer to run Windows 95, now I lost my D drive and my CD ROM Drive.

I have 2 hard drives in my computer.  The C & D drives were both on the new Hard Drive (a Maxtor.  The E drive (the original C Drive) does not show up on my  Windows Explorer.

My CD Rom drive no longer works either. My son really messed up my computer.

Please help.
You want to rule out any damage to internal components as well as loose connections.  1-2 hours at a local computer repair shop will fix it or at least tell you how bad it is.

We're all in this together.

CayanneAuthor Commented:
I appreciate the answer, but it isn't what I wanted to hear.  Andyman can have the points.

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