I just last Sunday bought a HP laptop and it runs windows8 just fine. I installed a few apps (avast! foxit pdf reader, malwarebytes, superantispyware, open office 4, mozilla, opera) and yesterday decided to install the 8.1 upgrade. I followed instructions, which were basically to select 'store' click on upgrade to 8.1, and watch the download & install.
The download and install went fine, the reboot went OK, but I immediately received a message that the upgrade failed sand Windows8 was being restored. the error code was 0xC1900101-0x30018. I disabled the avast firewall, tried again, same error message.
Since then, I made sure all available Microsoft updates were applied.
I'm ready to try installing the 8.1 upgrade, again.
Has anyone else had any experience with an error like this, and, BTW, the laptop was bought in Staples, then returned and 'wiped back to factory ship condition' and then I bought it. I can still return it, but I like the 17" screen size, and , of course, I can't predict how a brand new never been opened PC will act on the upgrade.
Thanks for any and all hints. !!
.. doc ..