the KFM File manager is not updated to support IE 10, you can force it to use the IE 9 rendering engine by editing the "webasssist/kfm/index.php" file, just after the opening <head> tag, add the following code:
<meta http-equiv="x-ua-compatible" content="IE=9" >
if you are using an older version of Power CMS< it may have CKEditor 3 which does not work in IE 10. You can manually update the CKEditor version:
in the webassist/ folder, rename the ckeditor folder to ckeditor_bak
On this page:
click the button to launch CK Builder. Select to use the Full Preset, and the Kama Skin.
Copy the downloaded CKEditor folder to the webassist folder in your site.
from the ckeditor_back folder, copy the following three files:
and paste them in the new ckeditor folder.
you will need to clear the browsers cache to see the updates take effect.