I had an old (2009) Olibook P1500 with Windows 7. In the following, I will give some advice to those who want to upgrade it to Windows 10.
In fact, the problem is that Olivetti does not support anymore this PC and even in the old support page you cannot find any driver since Windows 7, so neither the Windows 8 ones that should be more or less more compatible with Windows 10.
P.S: 29/05/2020 After some months I can add some more information and suggestion. This PC hardware is very old and even with a new SSD, properly install its compatible drivers (especially the audio one) it is working fine even though the performance is not so good. For example, using Zoom for video-conferences, sometimes it has problems and the response to your requests is sometimes too slow. So, you can use it but mainly for browsing the Internet, edit files and listen to music!
First of all, I want to stress that no Windows 10 driver is provided by Olivetti: in the support page newest ones are related to Windows 7, so not even for Windows 8 (that could be possibly compatible with Windows 10 too)! Therefore it is useless to search for any help from that Olivetti site … that moreover is very, very slow!!!
Note that to find drivers in that support page is not very friendly: you have to go down the page, select in the left menu the item “Driver, Firmware – SW“, then select the product in the combo that will appear on your right:
I tried to install anyway Windows 10 in that Olibook P1500 as it was, that is with its 250 G HD. The installation succeeded, even though some generic drivers were chosen by the O.S.: however, the performance was horrible and it was nearly unusable!!
Then I bought a 500 GB SSD (for less than 90€): I easily changed the HD because, from below, you can access it simply unscrewing four screws. Then performances become more than acceptable!
Be careful: to have the audio work properly, please install the audio driver you can find in the support page (p1500_win7audio.zip), the newest ones related to Windows 7, to be installed in Windows 7 compatibility mode. On the contrary, the audio driver Windows 10 installs by default, does not work properly and the sound is croaking!!
Note: use Edge to navigate that site because I’ve experienced problems using Chrome even though it is really strange!
Finally, if you have some problem in updating Windows 10 to the newest version, you can see those links: