You have Sandboxie on your pc. If you browsed using SB you would have very little to worry about 
. There isn,t a site on the net i would worry about, if I was sandboxed
I don't understand how Sandboxie does this. Running a browser underSandboxie, let's say I visit a malicious site and click [OK] for my free, but malicious scan.
This scanner, as we all know will do any number of things from replacing (for example) userinit.exe, modify registry entries, maybe install a file as a critical system driver set to start even when windows starts in safe mode. If this malicious application loads, and does all of these things, does sandboxie keep it ALL contained without exception?
Have a read of the FAQ
http://www.sandboxie.com/index.php?FrequentlyAskedQuestions especially the part ' How does Sandboxie protect me, technically? '
Not all programs will run sandboxed. Quote " Sandboxie also prevents programs executing inside the sandbox from loading drivers directly. It also prevents programs from asking a central system component, known as the Service Control Manager, to load drivers on their behalf. In this way, drivers, and more importantly, rootkits, cannot be installed by a sandboxed program. "
Also there is a possibility that malware can read sensitive info on your pc. In the paid version programs can be forced to open sandboxed, and internet access allowed to only certain programs. So that malware inside the box cannot transmit data.
Remember nothing is 100% bullet proof. There is a discussion ongoing that Comodo firewall is actually able to pull a file out of a sandbox, infecting the pc. Although this has not been proven.
Some people on wilders have tested some nasty stuff sandboxed, as far as i am aware nothing escaped. ( yet
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