Antoine, the following MSKB article shows the causes and the cure procedures for your Activation wizard page anomaly.
Q314935 - "Blank Activate Windows Page in the Windows Product Activation Wizard".
I understand that you don't have a windows XP media. You should contact your vendor in order to solve this problem. Yes, this is important. The problem is categorized as: "I don't have an installation CD - what if I need one?"
However, if you're in one of the situations described in the following I don't have an installation CD - what if I need one? article, as it's mentioned There are circumstances where you may have a legal installation of Windows XP without an installation CD.
As for your concern regarding docs lost after repair or install, yes could be lost. However, there are many possibilities here depending of how:
- your windows XP was installed
- you set your docs folders (standard windows vs. particular set)
- many partitions your PC has
- the new setup is chosen. Example: in-place repair vs. new installation, etc.etc.
It's time to do some order in your working context, before things go worse.
Good Luck,
Cetin
Trying to unweave, unwind, unravel
And piece together the past and the future,
T. S. Eliot