TinaReiter,
Thanks for the info, the model and OS is valuable information. There are not many other browsers for the RT however if you check the store you can find them. I have used the UC browser, which is free in the Microsoft store and like others compatible with RT.
First, I would check the date, time and region on your device. If the date or time is not correct, it can cause issue with web servers including mail servers, which can then give errors regarding security. To correct the date and/or time swipe from the right, tap settings and then change PC settings. Tap time and language. Turn off “set time automatically”. Change the time zone if needed. Then tap change to correct the date and/or time. You can then turn on the set time automatically.
On the left panel tap on Region and language and check or correct the region.
The next step would be to uninstall and reinstall Internet Explorer. This is done in the control panel. Swipe right and tap search. Type in control panel and tap on it. Click on uninstall a program. When programs and features come up tap on Turn Windows features on or off, on the left panel. This may take a moment to open the Windows features box. Find Internet Explorer in the list and remove the check next to it. You should receive a message or warning please click yes to continue. Click ok on the Windows features box. Another windows will pop up and ask to restart please do. This will uninstall Internet Explorer. To reinstall it follow the same steps however, you will be putting a check next to Internet Explorer in the Windows features box.
At this point, I would think you could get online. If not I would suggest either a refresh or reset. Instructions are located here. A couple things to note only have the Microsoft keyboard and power connected and although a refresh saves our data, it also saves a backup copy of Windows that can be 7-8 GB in size. This can be a problem with smaller drives. If you have a 32 GB drive, you may want to back up your data and run a reset.