Safe Mode uses a limited number of drivers and applications. If you are using a wifi dongle you may not be able to get online. Because of the limited number of drivers and applications there are aspect of the Speccy Snapshot which will not function. Safe Mode uses a native Windows graphic driver which, this means that the Speccy will not be able to provide any information for the graphics. I use a wifi dongle to connect to my router and modem, because of this I can't get online when I'm in Safe Mode even with Networking. I don't have a computer with Windows 7, so I'm going by the results I'm seeing in Windows 10 and what Google finds for Windows 7.
The minitoolbox appears to work in Safe Mode.
Open the Task Manager and look in the Processes to see which process is hogging your RAM. Please make a screenshot of the taskmanager and post the image in your topic.
How to make a screenshot and post it in your topic
Press the Print Screen to capture its image.
Open Paint and click/tap on Paste
Click/tap on File and select Save as, add a name for the file.
How to post an image in your topic
Just below the area where you write text in a post there is the Post button, to the right of this is More Reply Options.
When you click on More Relpy Options you will see Attach Files and Browse, click on Browse, this will open Pictures on your computer, click on the image you want to post, then click on Attach This File, then Add Reply.