Android Studio loading infinite

Hello, since yesterday I come across a problem in Android Studio, When it opens it does not finish loading the project, yesterday I left it for more than 5 hours and nothing ... I already deleted the folder .gradle and it did not work, I tried to open it for a backup of my project and again infinite loop ... I just created a new project for the time being in 15 minutes and again, nothing!

  

I noticed something new here.

     Exception in thread "png-cruncher_5" java.lang.RuntimeException: Timed out while waiting for slave aapt process, make sure the aapt execute at C: \ Users \ walla \ AppData \ Local \ Android \ Sdk \ build-tools \ 25.0.3 \ aapt.exe can run successfully (some anti-virus may block it) or try setting environment variable SLAVE_AAPT_TIMEOUT to a value greater than 5 seconds       at com.android.builder.png.AaptProcess.waitForReady (AaptProcess.java:108)       at com.android.builder.png.QueuedCruncher $ 1.creation (QueuedCruncher.java:121)       at com.android.builder.tasks.WorkQueue.run (WorkQueue.java:205)       at java.lang.Thread.run (Thread.java:745)

     Exception in thread "png-cruncher_1" java.lang.RuntimeException: Timed out while waiting for slave aapt process, make sure the aapt execute at C: \ Users \ walla \ AppData \ Local \ Android \ Sdk \ build-tools \ 25.0.3 \ aapt.exe can run successfully (some anti-virus may block it) or try setting environment variable SLAVE_AAPT_TIMEOUT to a value greater than 5 seconds       at com.android.builder.png.AaptProcess.waitForReady (AaptProcess.java:108)       at com.android.builder.png.QueuedCruncher $ 1.creation (QueuedCruncher.java:121)       at com.android.builder.tasks.WorkQueue.run (WorkQueue.java:205)       at java.lang.Thread.run (Thread.java:745)

     Exception in thread "png-cruncher_3" java.lang.RuntimeException: Timed out while waiting for slave aapt process, make sure the aapt execute at C: \ Users \ walla \ AppData \ Local \ Android \ Sdk \ build-tools \ 25.0.3 \ aapt.exe can run successfully (some anti-virus may block it) or try setting environment variable SLAVE_AAPT_TIMEOUT to a value greater than 5 seconds       at com.android.builder.png.AaptProcess.waitForReady (AaptProcess.java:108)       at com.android.builder.png.QueuedCruncher $ 1.creation (QueuedCruncher.java:121)       at com.android.builder.tasks.WorkQueue.run (WorkQueue.java:205)       at java.lang.Thread.run (Thread.java:745)

     Exception in thread "png-cruncher_4" java.lang.RuntimeException: Timed out while waiting for slave aapt process, make sure the aapt execute at C: \ Users \ walla \ AppData \ Local \ Android \ Sdk \ build-tools \ 25.0.3 \ aapt.exe can run successfully (some anti-virus may block it) or try setting environment variable SLAVE_AAPT_TIMEOUT to a value greater than 5 seconds       at com.android.builder.png.AaptProcess.waitForReady (AaptProcess.java:108)       at com.android.builder.png.QueuedCruncher $ 1.creation (QueuedCruncher.java:121)       at com.android.builder.tasks.WorkQueue.run (WorkQueue.java:205)       at java.lang.Thread.run (Thread.java:745)

     Exception in thread "png-cruncher_2" java.lang.RuntimeException: Timed out while waiting for slave aapt process, make sure the aapt execute at C: \ Users \ walla \ AppData \ Local \ Android \ Sdk \ build-tools \ 25.0.3 \ aapt.exe can run successfully (some anti-virus may block it) or try setting environment variable SLAVE_AAPT_TIMEOUT to a value greater than 5 seconds       at com.android.builder.png.AaptProcess.waitForReady (AaptProcess.java:108)       at com.android.builder.png.QueuedCruncher $ 1.creation (QueuedCruncher.java:121)       at com.android.builder.tasks.WorkQueue.run (WorkQueue.java:205)       at java.lang.Thread.run (Thread.java:745)