I uninstall some files thru ROM toolbox and forgot to back-up everything. I am not sure what specifically I deleted that it goes likes this: I can't download any apps and files on the internet. Wi-Fi is not a problem. I have an internet access (e.g. facebook, mail, Google, market,etc.) Every time I download something It says "Download unsuccessful". On Android Market, everytime i download an apps, The download button shows on the screen saying "Downloading.." and just vanished. I tried many solutions but nothing works (e.g. clear cache, clear data,reboot,unroot and so on.) I also tried to download the apps in my computer and transfer it to my phone.. but installer doesn't works. Unknown Resources is checked. "Before" I can install them. But now, if you click the application files nothing happen, nothing shows, nothing says. Other files shows "No application can perform this action". Any solutions? Please Help.