Go here https://www.asus.com/support/Download/3/295/0/7/3mxEvf3TFaWwIvxq/36/ and either download and install the Windows flash utility, this is the most comfortable but not the most recommended way to flash the Bios. It's a no-brainer.
The recommended way is to download the Bios file, put it on...
This can be tricky. I had these high interrupts on USB ports, too. But it turned out to be a faulty graphics driver causing the system interrupts to go havoc. It can be caused by pretty much everything you don't expect. Programs like process explorer can help to figure out what process forces...
I'm really confused about the drivers update policy at their site. I saw the new version posted on the site of a computer magazin i regulary visit, with official release notes by Intel, pointing to their download servers. But obviously that version is not released there, yet. I don't know if I'm...
If your system runs stable, there is no need for updating. Updating these components can cause more trouble than benefits.
Your board manufactorer should offer the valid versions of Rapid Storage and Management Engine for you board.
I'm currently using Thunderbird with the Lightning add-on, but not that the whole thing is just sluggish, it's error-prone as well. Syncing IMAP takes ages, too.
Is there anything comparable which has support for Google calendar sync in one program without any hassle of registration or hacking...
Judging by your dxdiag.txt the driver of your soundcard is the windows generic driver from Microsoft.
You should install the driver from Asus. Either from the CD (if you have one), or from the product support site on asus.com
If you are familiar with process explorer tools, you can pinpoint what process is causing the high load. I solved it by installing the newest graphics driver. But it may be any other driver in your system.
I also have no problems using CCleaner. Haven't had any under '98, XP, 8, 8.1.
Cleaners come from a time where HDD space was few and OSs where fragile in stability. They could fix invalid registry entrys causing problems when programs were uninstalled, but they also could make a mess.
Try to disable fastboot, thats what I did. I'm not sure whether it is a driver issue or anything else. Give latest drivers a try, if it not works, disable fastboot. With an 840 EVO you should espect almost the same startup time, so disabling fastboot doesn't hurt too much.
After Windows installation has finished:
1. chipset drivers
3. Rapid Storage (if you don't plan to setup a RAID, it will at least help to save some power)
4. Graphic drivers
5. Sound drivers
There is no need to install any drivers during Windows setup because Win 8.1 includes the...