ASPI is actually a throwback from SCSI disk days, but applies to burners, that use the same sort of drivers to burn CD's (oversimplified explanation), either way, you need an ASPI layer to burn, so if yours is corrupt or missing, things don't work.
To reinstall ME:
First you need to rename the file "win.com" found in the c:\windows folder
If you can get into Windows, just use Explorer, find it, and rename it to win.bak
If you can't get into Windows, boot to any startup disk.
From the A:\ prompt, type: c: and hit Enter
From the C:\ prompt, type: cd windows {Enter}
At the c:\windows prompt, type: ren win.com win.bak {Enter}
Restart the computer, and go into the BIOS setup.
In the Advanced screen, change the boot sequence to read CD-ROM first, doesn't matter what comes after that.
Insert the ME CD, and restart the computer.
When prompted, hit the "any key" to boot from CD-ROM
This will start the Windows setup.
Part way through the installation, you will be prompted to what path you want to install windows to.
It should say in the box: c:\windows.000
Simply delete the .000 so it reads c:\windows
Continue the install.
This will install Windows over top of the one that's already there, so you don't lose any settings or data.
To do a "parallel" install:
This is the option to have a NEW installation of Windows on the computer, while keeping the old intact, but NOT bootable.
Boot to a DOS diskette.
Change to c: as per instructions above
At the c:\ prompt, type: ren c:\windows c:\winbak
Restart, change BIOS boot sequence, boot to the CD, and continue as above.
You will have a plain new installation after this. Everything you HAD is still there, but no programs will run.
From here, I would immediately install your burning program, and burn all your backups.
Next would be to start fresh, which only requires a format before the install.
Boot to any good DOS diskette.
At the A:\ prompt, type: format c: /u {Enter}
Let it finish, give the drive a label if you like (not necessary).
Change boot sequence in BIOS as above, and continue to install a fresh Windows.
Now you can restore any backups, and install all your software.
If, after you do the "install over top" you find that windows is working nicely, and all your programs work, you may want to stop there, and not bother with a fresh install. It's up to you, however, it may never work correctly until you do a fresh install.
Hope this helps

Cheers,
Jim