Uvek prvo pitaj google:
http://www.google.com/#hl=en&source=hp&q=isapnp.sis+is+corrupted&btnG=Google+Search&aq=f&aqi=&aql=&oq=&gs_r... &fp=62c7546c9e19fcb7

pa onda redom
http://support.microsoft.com/kb/315311
To resolve this issue, use Recovery Console to replace the Isapnp.sys file.
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Windows XP
To replace the Isapnp.sys file in Windows XP, follow these steps:

1. Start the computer from the Windows XP CD-ROM.
2. At the Welcome to Setup screen, press R to start Recovery Console.
3. If you have a dual-boot or a multiple-boot computer, type the number that corresponds to your Windows XP installation when you are prompted to select the Windows installation to log on to, and then press ENTER.
4. When you are prompted for the Administrator password, type the password, and then press ENTER.

Note If the administrator password is blank, just press ENTER.
5. At the C:Windows prompt, type the following command, and then press ENTER:
ren c:windowssystem32driversisapnp.sys isapnp.old
Note The steps in this article assume that you installed Windows XP to the C: drive. The actual location of your Windows installation may vary.
6. At the C:Windows prompt, type the following command, and then press ENTER:
expand cd-romdrive:i386isapnp.sy_ c:windowssystem32driversisapnp.sys
For example, type:
expand d:i386isapnp.sy_ c:windowssystem32drivers
7. After the file is successfully expanded, type exit, and then press ENTER to exit Recovery Console.
8. Restart the computer.

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Windows 2000
To replace the Isapnp.sys file in Windows 2000, follow these steps:

1. Start the computer from the Windows 2000 CD-ROM.
2. At the Welcome to Setup screen, press R to repair, and then press C to start Recovery Console.
3. At the C:Winnt prompt, type the following command, and then press ENTER:
expand cd-romdriveletter:i386isapnp.sy_ c:winntsystem32driversisapnp.sys
For example, type:
expand d:i386isapnp.sy_ c:winntsystem32drivers
Note The steps in this article assume that you installed Windows 2000 to the C: drive. The actual location of your Windows installation may vary.
4. After the file is successfully expanded, type exit to exit Recovery Console.
5. Restart the computer.

obrisi windows iz nekog linuksa, pa onda instaliraj.

Može da bude dosta toga.
Naprimjer prvo cekiraj HDD, možda ima neki BAD Sector na početku diska, pa to koci. Ima onaj Hirrens Boot, disk sa svakakvim programima. Imaš tu opciju da podignes Mini Windows sa diska. E kada to odradis, otvoris command promt i kucas chkdsk c: /f, i chkdsk c: /r
ovim popravljas HDD od bad sektora i nekih sitnih ostecenja.
A linux možeš da podignes sa diska, i preko njega skidas particiju c i windows na njoj.
Polsje svega ovoga uradi instalaciju windowsa, mislim da ćeš uspjeti..

pozz, www.bgdracunari.com