Cannot install the latest version of ALM Qualty Center, when navigating to the URL, http://xx.xxx.xx.xxx:xxxx/qcbin/start_a.jsp, and clikc on Install (as prompted by the windonws to install the update), the file ALM-Platform-Loader.msi donwload fine, but when trying to run it it displays that error message. If I save the file, I can install it, but when navigating to the URL I got now this error message: "Initialization has failed. Contact your system administrator. Failure details: http://xx.xxx.xx.xxx:xxxx/qcbin/setup_a.cab - This file has no digital signature or signature cannot be validated". If I check on the file, the certificate is revoked. How can I by pass that validation or fix it. I 've already (during the last three days) read and try almost everything people has posted about. Configuration is Windows 7 with SP1, iE11 32 bits, I have full admin privileges. Tried unistall manually and with the ALM/QC unistall tool. Install all the certificates everyone has mentiones. Set Internert Options with the recommended securiry/privacy/advanced settings. I have no more ideas, unless this is caused by incompatibility of a windows update and the iE. I did restar iE11, but I cannot do same for Windows. Any fresh ideas....? most of our team was able to install it and is working fine, just a copule of us have this issue.