Database run in archive log mode

Short answer: You can't. If your windows system is dead, you'll need to restore to another windows system. From there you must migrate your database using Oracle utilities:

Metalink indicates the following:

There is no Migration utility (Script or DBUA) to perform a cross platform migration.

To change platforms require the database instance be re-built and / or the data moved using one of the following methods:

1. Export / Import to include the use of Datapump facilities. all versions support Export/Import but for Datapump 10.1.0.2 or higher is required
2. Transportable Tablespaces 10G or Later
3. RMAN Convert Database functions. 10G or Later

The choices available will depend on BOTH the OS and Oracle versions of both the source and destination.

For example RMAN Convert Database only works if both source and destination belong to same ENDIAN format.

Transportable Tablespaces has a convert function to convert from one ENDIAN format to another.

HTH.

Your database is looping as it attempt to do a recovery and bring undo segments back online to recover your database. Since you are not a dba, I would immediately get oracle support on the line and tell them that you need major assistance and that you are not a dba. They will very likely have you startup the database and disable the recovery manager that is having smon loop trying to clean up undo segments. Having had to do undo segment cleanup in the past, it is best done with oracle supports help. Much of the steps will require some events and underscore parameters that disable/enable hidden oracle mojo. I would not recommend attempting anything you find on your own or is posted without understanding the implication and possibly how to recover/back out of your attempts. The object is to recover your database and not make it worse. Get oracle support on the phone asap.